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36 lines
1.3 KiB
C
36 lines
1.3 KiB
C
#ifndef METADATA_H
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#define METADATA_H
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#include "file.h"
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#include <stdbool.h>
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#include <stdint.h>
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#include <sys/stat.h>
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/*
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* Wire format (introduced in protocol version 2.0.0):
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* int32_t present
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* int32_t mode (was mode_t, platform-dependent)
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* int32_t uid (was uid_t, platform-dependent)
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* int32_t gid (was gid_t, platform-dependent)
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* int64_t mtime_sec (was time_t, platform-dependent)
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* int64_t mtime_nsec (was long, platform-dependent)
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*
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* Prior to 2.0.0 the wire format used the raw platform-dependent types,
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* which broke compatiblity across different systems. All fields are now
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* serialized as fixed-width integers.
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*/
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/* Size of metadata fields on wire, excluding the int32_t `present` field that
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* is always sent first. The total wire size for present metadata is
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* sizeof(int32_t) + FILE_METADATA_WIRE_SIZE (32 bytes on most platforms). */
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#define FILE_METADATA_WIRE_SIZE (sizeof(int32_t) * 3 + sizeof(int64_t) * 2)
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void metadata_to_buf(char** buf, const FileMetadata* m);
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FileMetadata* metadata_from_buf(char** buf);
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bool metadata_send(int file_descriptor, FileMetadata* m);
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FileMetadata* metadata_receive(int file_descriptor, int* ok);
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void file_restore_metadata(const char* path, const FileMetadata* metadata);
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bool file_restore_metadata_fd(int fd, const FileMetadata* metadata);
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#endif
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